Dark Heart is on ITV at 9pm.

In this second episode, the detectives are confronted by a wall of silence when they investigate a series of violent attacks.

Ariana Grande at the BBC is on BBC One at 8pm.

Davina McCall presents this one-off musical special, in which American singer Ariana Grande performs tracks from her new album.

The First is on Channel Four at 9pm.

An eight-part sci-fi drama series, following the efforts of a single-minded executive, to launch the first manned mission to Mars.

Ambulance is on BBC One at 9pm.

The North West Ambulance crews are kept busy by a repeat caller, who is moving around Manchester’s canals on his barge.

Diagnosis on Demand? The Computer Will See You Now is on BBC Two at 9pm.

One-off documentary in which Hannah Fry explores how Artificial Intelligence is transforming healthcare provision.

Shop Smart, Save Money for Christmas is on Channel Five at 8pm.

Series in which co-hosts, Fiona Phillips and Gaby Roslin, offer advice on getting the best value for money, ahead of the festive season.